/*!
 * @license
 * Copyright 2016 Alfresco Software, Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// tslint:disable-next-line:adf-file-name
import { AfterViewInit, Component, ElementRef, Input, OnDestroy, OnInit, ViewChild } from '@angular/core';
import { ActivatedRoute, Router } from '@angular/router';
import { Pagination } from 'alfresco-js-api';
import { AnalyticsReportListComponent } from 'ng2-activiti-analytics';
import { FORM_FIELD_VALIDATORS, FormEvent, FormFieldEvent, FormRenderingService, FormService } from 'ng2-activiti-form';
import {
  FilterProcessRepresentationModel,
  ProcessFiltersComponent,
  ProcessInstance,
  ProcessInstanceDetailsComponent,
  ProcessInstanceListComponent,
  StartProcessInstanceComponent
} from 'ng2-activiti-processlist';
import {
  AppsListComponent,
  FilterRepresentationModel,
  TaskDetailsComponent,
  TaskDetailsEvent,
  TaskFiltersComponent,
  TaskListComponent,
  TaskListService
} from 'ng2-activiti-tasklist';
import { AlfrescoApiService } from 'ng2-alfresco-core';
import {
  DataSorting,
  ObjectDataRow,
  ObjectDataTableAdapter
} from 'ng2-alfresco-datatable';
import { Subscription } from 'rxjs/Rx';
import { /*CustomEditorComponent*/ CustomStencil01 } from './custom-editor/custom-editor.component';
import { DemoFieldValidator } from './demo-field-validator';

declare var componentHandler;

const currentProcessIdNew = '__NEW__';
const currentTaskIdNew = '__NEW__';

@Component({
  selector: 'activiti-demo',
  templateUrl: './activiti-demo.component.html',
  styleUrls: ['./activiti-demo.component.css']
})
export class ActivitiDemoComponent implements AfterViewInit, OnDestroy, OnInit {

  @ViewChild(TaskFiltersComponent)
  activitifilter: TaskFiltersComponent;

  @ViewChild(TaskListComponent)
  taskList: TaskListComponent;

  @ViewChild(ProcessFiltersComponent)
  activitiprocessfilter: ProcessFiltersComponent;

  @ViewChild(ProcessInstanceListComponent)
  processList: ProcessInstanceListComponent;

  @ViewChild(ProcessInstanceDetailsComponent)
  activitiprocessdetails: ProcessInstanceDetailsComponent;

  @ViewChild(TaskDetailsComponent)
  activitidetails: TaskDetailsComponent;

  @ViewChild(StartProcessInstanceComponent)
  activitiStartProcess: StartProcessInstanceComponent;

  @ViewChild(AnalyticsReportListComponent)
  analyticsreportlist: AnalyticsReportListComponent;

  @Input()
  appId: number = null;

  fileShowed: boolean = false;
  selectFirstReport: boolean = false;

  private tabs = { tasks : 0 , processes : 1, reports: 2};

  content: Blob;
  contentName: string;

  layoutType: string;
  currentTaskId: string;
  currentProcessInstanceId: string;

  taskSchemaColumns: any [] = [];
  taskPagination: Pagination = {
    skipCount: 0,
    maxItems: 10,
    totalItems: 0
  };
  taskPage: number = 0;
  processSchemaColumns: any [] = [];

  activeTab: number = this.tabs.tasks; // tasks|processes|reports

  taskFilter: FilterRepresentationModel;
  report: any;
  processFilter: FilterProcessRepresentationModel;

  sub: Subscription;
  blobFile: any;
  flag: boolean = true;

  dataTasks: ObjectDataTableAdapter;
  dataProcesses: ObjectDataTableAdapter;

  fieldValidators = [
    ...FORM_FIELD_VALIDATORS,
    new DemoFieldValidator()
  ];

  constructor(private elementRef: ElementRef,
              private route: ActivatedRoute,
              private router: Router,
              private taskListService: TaskListService,
              private apiService: AlfrescoApiService,
              formRenderingService: FormRenderingService,
              formService: FormService) {
    this.dataTasks = new ObjectDataTableAdapter();
    this.dataTasks.setSorting(new DataSorting('created', 'desc'));

    this.dataProcesses = new ObjectDataTableAdapter(
      [],
      [
        { type: 'text', key: 'name', title: 'Name', cssClass: 'full-width name-column', sortable: true },
        { type: 'text', key: 'started', title: 'Started', cssClass: 'hidden', sortable: true }
      ]
    );
    this.dataProcesses.setSorting(new DataSorting('started', 'desc'));

    // Uncomment this line to replace all 'text' field editors with custom component
    // formRenderingService.setComponentTypeResolver('text', () => CustomEditorComponent, true);

    // Uncomment this line to map 'custom_stencil_01' to local editor component
    formRenderingService.setComponentTypeResolver('custom_stencil_01', () => CustomStencil01, true);

    formService.formLoaded.subscribe((e: FormEvent) => {
      console.log(`Form loaded: ${e.form.id}`);
    });

    formService.formFieldValueChanged.subscribe((e: FormFieldEvent) => {
      console.log(`Field value changed. Form: ${e.form.id}, Field: ${e.field.id}, Value: ${e.field.value}`);
    });

    // Uncomment this block to see form event handling in action
    /*
     formService.formEvents.subscribe((event: Event) => {
     console.log('Event fired:' + event.type);
     console.log('Event Target:' + event.target);
     });
     */
  }

  onPrevPage(pagination: Pagination): void {
    this.taskPagination.skipCount = pagination.skipCount;
    this.taskPage--;
  }

  onNextPage(pagination: Pagination): void {
    this.taskPagination.skipCount = pagination.skipCount;
    this.taskPage++;
  }

  onChangePageSize(pagination: Pagination): void {
    const { skipCount, maxItems } = pagination;
    this.taskPage = this.currentPage(skipCount, maxItems);
    this.taskPagination.maxItems = maxItems;
    this.taskPagination.skipCount = skipCount;
  }

  onChangePageNumber(pagination: Pagination): void {
    const { maxItems, skipCount } = pagination;
    this.taskPage = this.currentPage(skipCount, maxItems);
    this.taskPagination.maxItems = maxItems;
    this.taskPagination.skipCount = skipCount;
  }

  currentPage(skipCount: number, maxItems: number): number {
    return (skipCount && maxItems) ? Math.floor(skipCount / maxItems) : 0;
  }

  ngOnInit() {
    this.taskListService.tasksList$.subscribe(
      (tasks) => {
        this.taskPagination = {count: tasks.data.length, maxItems: this.taskPagination.maxItems, skipCount: this.taskPagination.skipCount, totalItems: tasks.total};
        console.log({count: tasks.data.length, maxItems: this.taskPagination.maxItems, skipCount: this.taskPagination.skipCount, totalItems: tasks.total});
      }, (err) => {
        console.log('err');
      });

    if (this.router.url.includes('processes') ) {
      this.activeTab = this.tabs.processes;
    }
    this.sub = this.route.params.subscribe(params => {
      let applicationId = params['appId'];
      if (applicationId && applicationId !== '0') {
        this.appId = params['appId'];
      }

      this.taskFilter = null;
      this.currentTaskId = null;
      this.processFilter = null;
      this.currentProcessInstanceId = null;
    });
    this.layoutType = AppsListComponent.LAYOUT_GRID;

  }

  ngOnDestroy() {
    this.sub.unsubscribe();
  }

  onTaskFilterClick(filter: FilterRepresentationModel): void {
    this.applyTaskFilter(filter);
  }

  onReportClick(event: any): void {
    this.report = event;
  }

  onSuccessTaskFilterList(event: any): void {
    this.applyTaskFilter(this.activitifilter.getCurrentFilter());
  }

  applyTaskFilter(filter: FilterRepresentationModel) {
    this.taskFilter = filter;
    if (filter && this.taskList) {
      this.taskList.hasCustomDataSource = false;
    }
  }

  onStartTaskSuccess(event: any): void {
    this.activitifilter.selectFilterWithTask(event.id);
    this.currentTaskId = event.id;
  }

  onCancelStartTask() {
    this.currentTaskId = null;
    this.reloadTaskFilters();
  }

  onSuccessTaskList(event: FilterRepresentationModel) {
    this.currentTaskId = this.taskList.getCurrentId();
  }

  onProcessFilterClick(event: FilterProcessRepresentationModel): void {
    this.currentProcessInstanceId = null;
    this.processFilter = event;
  }

  onSuccessProcessFilterList(): void {
    this.processFilter = this.activitiprocessfilter.getCurrentFilter();
  }

  onSuccessProcessList(event: any): void {
    this.currentProcessInstanceId = this.processList.getCurrentId();
  }

  onTaskRowClick(taskId): void {
    this.currentTaskId = taskId;
  }

  onProcessRowClick(processInstanceId): void {
    this.currentProcessInstanceId = processInstanceId;
  }

  onEditReport(name: string): void {
    this.analyticsreportlist.reload();
  }

  onReportSaved(reportId): void {
    this.analyticsreportlist.reload(reportId);
  }

  onReportDeleted(): void {
    this.analyticsreportlist.reload();
    this.analyticsreportlist.selectReport(null);
  }

  navigateStartProcess(): void {
    this.resetProcessFilters();
    this.reloadProcessFilters();
    this.currentProcessInstanceId = currentProcessIdNew;
  }

  navigateStartTask(): void {
    this.resetTaskFilters();
    this.reloadTaskFilters();
    this.currentTaskId = currentTaskIdNew;
  }

  onStartProcessInstance(instance: ProcessInstance): void {
    this.currentProcessInstanceId = instance.id;
    this.activitiStartProcess.reset();
    this.resetProcessFilters();
  }

  onCancelProcessInstance() {
    this.currentProcessInstanceId = null;
    this.reloadProcessFilters();
  }

  isStartProcessMode(): boolean {
    return this.currentProcessInstanceId === currentProcessIdNew;
  }

  isStartTaskMode(): boolean {
    return this.currentTaskId === currentTaskIdNew;
  }

  processCancelled(data: any): void {
    this.currentProcessInstanceId = null;
    this.processList.reload();
  }

  onSuccessNewProcess(data: any): void {
    this.processList.reload();
  }

  onFormCompleted(form): void {
    this.currentTaskId = null;
    this.taskPagination.totalItems--;
    const { skipCount, maxItems, totalItems } = this.taskPagination;
    if (totalItems > 0 && (skipCount >= totalItems)) {
      this.taskPagination.skipCount -= maxItems;
    }
    this.taskPage = this.currentPage(this.taskPagination.skipCount, maxItems);
    this.taskList.reload();
  }

  onFormContentClick(content: any): void {
    this.fileShowed = true;
    this.content = content.contentBlob;
    this.contentName = content.name;
  }

  onAuditClick(event: any) {
    console.log(event);
  }

  onAuditError(event: any): void {
    console.error('My custom error message' + event);
  }

  onTaskCreated(data: any): void {
    this.currentTaskId = data.parentTaskId;
    this.taskList.reload();
  }

  onTaskDeleted(data: any): void {
    this.taskList.reload();
  }

  ngAfterViewInit() {
    // workaround for MDL issues with dynamic components
    if (componentHandler) {
      componentHandler.upgradeAllRegistered();
    }

    this.loadStencilScriptsInPageFromActiviti();
  }

  loadStencilScriptsInPageFromActiviti() {
    this.apiService.getInstance().activiti.scriptFileApi.getControllers().then(response => {
      if (response) {
        let s = document.createElement('script');
        s.type = 'text/javascript';
        s.text = response;
        this.elementRef.nativeElement.appendChild(s);
      }
    });
  }

  onShowProcessDiagram(event: any): void {
    this.router.navigate(['/activiti/apps/' + this.appId + '/diagram/' + event.value]);
  }

  onProcessDetailsTaskClick(event: TaskDetailsEvent): void {
    event.preventDefault();
    this.activeTab = this.tabs.tasks;

    const taskId = event.value.id;
    const processTaskDataRow = new ObjectDataRow({
      id: taskId,
      name: event.value.name || 'No name',
      created: event.value.created
    });
    this.activitifilter.selectFilter(null);
    this.taskList.setCustomDataSource([processTaskDataRow]);
    this.taskList.selectTask(taskId);
    this.currentTaskId = taskId;
  }

  private resetProcessFilters(): void {
    this.processFilter = null;
  }

  private resetTaskFilters(): void {
    this.taskFilter = null;
  }

  private reloadProcessFilters(): void {
    this.activitiprocessfilter.selectFilter(this.activitiprocessfilter.getCurrentFilter());
  }

  private reloadTaskFilters(): void {
    this.activitifilter.selectFilter(this.activitifilter.getCurrentFilter());
  }

  onRowClick(event): void {
    console.log(event);
  }

  onRowDblClick(event): void {
    console.log(event);
  }

  isTaskCompleted(): boolean {
    return this.activitidetails.isCompletedTask();
  }

  onAssignTask() {
    this.taskList.reload();
    this.currentTaskId = null;
  }
}
